Based on a company, all departments and units which dispose and invest existing and incoming financials are called treasury. Additionally, those units focus on securitizing and minimizing risks which nowadays exceed the risk handling of the money market and foreign exchange. This thesis is mainly of interest for software developers, software architects and business analysts which are acting in the financial business and focused on the design of a service- oriented treasury management system to gain an improvement in performance, scalability and modularity. Within the analysis three different views are described: the management, the business and the service perspective. Afterwards, an architectural design is described in the 4+1 model and a separate section for the non-functional requirements.